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RESEARCH PAPERS: Natural and Mixed Convection

Experiments on Chimney-Enhanced Free Convection

[+] Author and Article Information
T. S. Fisher, K. E. Torrance

Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853

J. Heat Transfer 121(3), 603-609 (Aug 01, 1999) (7 pages) doi:10.1115/1.2826022 History: Received August 01, 1998; Revised February 15, 1999; Online December 05, 2007

Abstract

Experimental results are presented for thermal systems consisting of a vertical, parallel-plate, isothermal heat sink and a chimney. A ridge of maximum total heat transfer is observed with respect to the plate spacing and heat-sink height. The magnitude of heat transfer and the location of optima confirm prior theoretical predictions by Fisher et al (1997) to within 11 percent. Averaged velocity measurements closely match theoretical predictions of mean velocity. Cold inflow at the chimney exit is quantified and shown to decrease overall heat transfer by approximately four percent.

Copyright © 1999 by The American Society of Mechanical Engineers
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